package com.array.www.controller;

import com.array.www.entities.CommonResult;
import com.array.www.entities.Payment;
import com.array.www.lb.MyLoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @Created by Mr.Array
 * @Description TODO
 * @Date 2021/5/13 10:54 下午
 */
@Slf4j
@RestController
public class OrderController {

    // 单机版本
   // public static final String PAYMENT_URL = "http://localhost:8001";

    public static final String PAYMENT_URL = "http://CLOUD-PROVIDER-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private DiscoveryClient discoveryClient;
    @Resource
    private MyLoadBalancer myLoadBalancer;

    @PostMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+ id, CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+ id, CommonResult.class);

        if (entity.getStatusCode().is2xxSuccessful()) {
            log.info(entity.getStatusCode()+"");
            return entity.getBody();
        } else {
            return new CommonResult<>();
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-SERVICE");
        if(instances == null || instances.size() <= 0){
            return null;
        }
        ServiceInstance serviceInstance = myLoadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }
}
